Arnold



' (No Model.)

S. ARNOLD.

LINK oRPTMAN.

No. 311,558. Patented Feb. 3,1885.

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SATTERLEE ARNOLD, OF BROOKLYN, NEWv YORK, ASSIGNOR TO ANNA M.

ARNOLD, OF SAME PLACE.

LlNl( OR PITMAN.

SPECIFICATION forming pari: of Letters Patent No. 311,558, datedFebruary 3, 1885.

Application filed June 2F, 158-1.

To aZwtout it may] concern.-

Be it known that I, SATTERLEE ARNOLD, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Links or Pitmen, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

The object of my invention is to provide a link or pitman for connectingcrank-pins and similar devices, of such construction that the parts maybe easily assembled together and the bearings thereof be equally fit-tedby one adjustment, while any looseness occasioned by wear may be readilycompensated for.

ln the drawings, Figure l is an elevation of my link or pitman withcranlcpins adapted thereto. Fig. 2 is a sectional view of the same, andFig. 3 represents the slotted caps in detail.

A indicates a hollow barrel or sleeve having right and left handscrew-threads on its opposite ends, an annular shoulder, a, adjacent toone of the threaded ends, and an internally threaded check nut, a,fitting the other threaded end and forming an adj ustable shoulder.

B is astem iittingloosely in the barrel A,and preferably having itsmiddle part somewhat reduced in size to lessen its weight. This stem Bismade of a length equal to the distance between the crank-pins or partswhich are t-o be connected, and as the crank-pins C,

as herein shown, are provided with spherical heads the ends of the stemB are shown as being formed concave, so as to form bearings fitting thesame.

D D are caps having slots d d to receive the shanks of the crank-pins,and internally threaded to lit the threaded ends of the barrel A. Thesecaps, when designed to be used with sphericalheaded pins, are formedconcave internally at their ends, as shown, to it the same.

When it is desired to make a connection, as of the pins O, (which willfirst be firmly screwed into the parts for which they are designed,) thecaps D will be placed over the (No moilcL) pins, and the barrel A, inwhich has been placed the stem B, will then be adjusted to the caps, andby turn1ng said barrel the caps will be drawn toward each other untilthe stem B fits snugly and equally against the pins O. The check-nut oradjustable shoulder a will then be tightened against its adjacent cap,thus preventing further rotation of the barrel and making a firmconnection. The shoulder a and the check-nut a are preferably milledexteriorly, as shown in Fig. l, to facilitate the rotation of the barreland of the Said nut.

In rotating the barrel to make the abovedescribed adjustment of theparts it will be understood that the caps D will be prevented fromrotating with the barrel by the pins C passing through the slots d insaid caps.

Vhen it is desired to adjust the parts to take up any loosenessoccasioned by wear of the bearings at the ends of the stem B or of thepins C, it is only necessary to loosen the check-nut or adjustableshoulder a', turn the barrel to take up the looseness, and then tightensaid check-nut again.

Instead of making the shoulders c and a fixed and adjustable,respectively, as above described, it will be obvious that both shouldersmay be made adjustable, or, in case it is not desired to compensate forwear,both shoulders may be iixed; but the construction shown isconsidered the best.

Having thus described my invention, I claim and desire to secure byLetters Patentl. A link or pitman consisting ofthe com-Y bination of ahollow barrel or sleeve having right and left hand screw-threads at itsopposite ends, a stein placed loosely in said barrel, and threaded capsfitting the threaded ends of said barrel, substantially as set forth.

2. A link or pitman consisting of the combination of a hollow barrel orsleeve having right and left hand screw-threads at its opposite ends, anannular fixed shoulder adjacent to one of the threaded ends, and acheck-nut or adjustable shoulder fitting the otherthreaded end, a stemplaced loosely in said'barrel, and threaded caps iitting the threadedends of said barrel, substantially as set forth.

3. The combination of the barrel A, hav- In testimony Whereof affix mysignature in ing right and left hand. threaded ends, annupresence of twoWitnesses. lar shoulder a, and eheeknut (d, stem B, hav- T ing concaveends, pins C, having spherical SATTERLEE ARBOLD 5 heads, and caps D,having slots Land threaded Titnessesz to t the threaded ends of saidbarrel, sub- PEROIVAL J. PARRIs,

stantially as set forth. l GEO. B. LAUGK.

